Device for nailing shoe-heels



March 20, 1962 J. VLC Z EK DEVICE FOR NAILING SHOEHEELS 2 Sheets-Sheet 1 Filed Dec. 9, 1958 INVEN IOR. JEROME VLCE/f @444,

March 20, 1962 J, EE

DEVICE FOR NAILING SHOE-HEELS 2 Sheets-Sheet 2 Filed Dec. 9, 1958 Fig.7

IINVELVTOR. M01712 VZCEK Utlitd 3,025,543 Patented Mar. 20, 1962 3,025,543 DEVICE FOR NAILING SHOE-HEELS Jarornir Viclr, Gottwaldov, Czechoslovakia, assignor to Zavody presneho strojirenstvi Gottwaldov, narodni podnik, Gottwaldov, Czechoslovakia Filed Dec. 9, 1958, Ser. No. 779,191 9 Claims. (Cl. 1243.5)

The present invention relates to a device for nailing together pre-assembled piles of small pieces of leather, cardboard and the like to make shoe heels.

This operation has hitherto been carried out by nailing the heel in a mold and then placing the mold above an ejector by which the heel is ejected from the mold upon the stroke of a piston, which at the same time nails a heel in another mold. While this process is satisfactory for nailing together heels, assembled from waste clippings, it requires a considerable number of molds.

In another known device, the heel is nailed and at the same time pushed out of the mold. This device may be used for low heels only. With higher and narrower heels, the uppermost sheets may be displaced in the course of nailing since they are not held in their centered position because of the simultaneous movement of the mold.

The present invention aims at overcoming the drawbacks of these known devices, according to the main feature of the invention, the nailed heel is pushed out of the mold only after the nails have passed through all sheets and the nailed heel is ejected at the same working station, where the nailing operation is carried out. With these and other objects in view, the invention provides a heel nailing device including a support, a mold base element on the support, and a tubular heel mold member. The heel mold member has an axis and is axially reciprocable relative to the base element between a first position in which the base element is located near one end of the mold member so as to define a cavity therein, and a second position in which the base element is located in the cavity near the other end of the mold member. The base member is formed with a plurality of axially extending openings through which nails can be driven into the mold cavity by nail driving means movably mounted on the support. The device is equipped with actuating means which sequentially actuate nail driving movement of the nail driving means and movement of the mold member from its first to its second position.

Other features and the attendant advantages of the invention will become apparent to those skilled in the art as the disclosure is made in the following detailed description of a preferred embodiment of the invention as illustrated in the accompanying drawing in which:

FIG. 1 is an elevational front view, partly in section, of the device in its loading position,

FIG. 2 is a fragmentary side-view, partly in section, of the device of FIG. 1,

FIG. 3 is a sectional view taken on the line AA of FIG. 2,

FIG. 4 is a sectional view of a detail of FIG. 2, taken on the line B-B,

FIG. 5 is an elevational front view of the device of FIG. 1 after nailing with the heel partly ejected from the mold,

FIG. 6 is a fragmentary side-view, partly in section, of the device of FIG. 5, and

FIG. 7 shows a detail of the device of FIG. 5 in section along the line CC.

The device of the invention for nailing shoe heels comprises substantially a nailing arrangement, a mold for holding the heel material while it is being nailed, and a device for ejecting the nailed heel from the mold.

Referring now to the drawing and more particularly to FIG. 1, there is shown a nailing head 1 of elongated substantially tubular shape axially mounted on a tubular connecting member 2 by means of which the nailing head is secured to a hollow portion 3 of the machine frame. The cavities of the hollow frame portion 3, the connecting member 2 and the nailing head 1 communicate and contain the nailing apparatus. The nailing head 1 has a cylindrical end portion 41 provided with a plurality of axially extending passages in which nail drivers 4 are slidable. One nail driver only is shown in the drawing for the sake of clarity. The nail drivers 4 are reciprocated by a pusher platform 5 mounted at one end of a push rod 6 which extends axially through the communicating cavities of the hollow frame portion 3, the connecting member 2, and the nailing head 1. A cam 7 is reciprocably slidable on the frame 3 and cooperates with a cam follower 61 to move the rod 6 for driving nails 8 axially outward from the nailing head 1. The return stroke of the rod 6 is actuated by a spring 62 in the cavity of the nailing head 1.

A support member 9 is mounted axially above the nailing head 1 on the machine frame (not shown) and is transversely movable to give access to a replaceable mold 10 for insertion of the pre-assembled heel 11, and axially relative to the mold between the positions shown in fully drawn lines in FIGS. 1 and 2 respectively. The mold 10 is of tubular truncated conical shape corresponding to the shape of the heel to be nailed therein. In the position of the apparatus illustrated in FIG. 1, the mold bottom is closed by the transverse terminal face of the cylindrical nailing head portion 41 which thus constitutes the base element of the mold 10. As best seen from FIG. 2, the mold 10 is mounted on two pins 14, 14 by means of catches 12 and nuts 13. The pins 14, 14' are slidably secured in axially extending bores of the connecting member 2 and are urged upward tby two helical compression springs 15, 15'. A pin 16 radially extends from each of the pins 14, 14 for engagement with an axial slot 17 in the connecting member 2 to prevent rotation of the pins 14, 14'. Upward travel of the pins 14, 14' under the constraint of the springs 15, 15 is limited by a stop 18 in the slot 17.

As shown in FIG. 4 in greater detail, the pins 14, 14' are releasably held in their top position by a spring loaded pin 19 engaging a rounded circumferential groove 20 in the pins 14, 14.

Referring again to FIG. 2, it is seen that the lower ends 21 of the pins 14, 14' are beveled and are each provided with a notch 22 near the end 21. Downward movement of the pins 14, 14' causes the mold 10 to be slipped downward over the cylindrical portion 41 so as to eject the heel 11 from the mold It The ejection mechanism is actuated by a bell crank lever 23 which is mounted on the frame portion 3 by means of a pivot 26 as best seen from. FIGS. 1 and 5. The two arms of the lever 23 are formed with axial bores. A pin 27 is slidable in the axial bore of one arm and its free end 23 which projects from the bore is linked to the driving cam 7 by a pivot pin 29 so that the reciprocating movement of the cam '7 causes the lever 23 to rock about the pivot 26.

A threaded bolt 32 is rotatably fastened in the axial bore of the second arm of hell crank lever 23, as shown in detail in FIG. 7. The bolt 32 threadedly engages a sliding block 31 the threaded ends of which project radically from the arm of the lever 23 through longitudinal slots 30. The spacing of the sliding block 31 from the pivot 26 can be adjusted by rotation of the bolt 32, and the bolt can be secured in the adjusted position by means of a nut and lock washer arrangement 33.

The ends of the sliding block 31 projecting from the lever 23 are pivotally fastened to one bifurcated end of a 24 by means of nuts 34. The other end of the link 24 is attached to a sleeve 25 by means of a pin 35. The sleeve is axially slidably mounted on a cylindrical support 36 in the connecting member 2 as best seen from FIGS. 1 and 3. An elongated detent member 37 is mounted on the sleeve 25 for rotation about the longitudinal axis of the connecting member 2. The two ends of the detent member 37 radially extend from the sleeve 25 in'opposite directions and the detent member is urged by a spring 38 into a position of axial alignment of the two ends thereof with the pins 14 and 14' respectively. The detent member 37 is pivotally displaced from the aligned position by a spring-biased releasing pin 39 which is slidably mounted in the connecting member 2 and which has an enlarged operating head arranged on the outside of the connecting member.

The longitudinal slots 3% are of arcuate configuration and have a radius of curvature equal to the distance between the pivots at the two ends of the link 24, that is, the distance between the threaded end of the sliding block 31 and the pin 35. When the sleeve 25 is in its upper terminal position, the pin 35 is located at the center of curvature of the slots 30. Shifting the sliding block 31 thus changes the length of the stroke of the sleeve 25 but it does not shift the upper limit of the stroke.

The described device operates as follows: The preassembled pieces of heel material are inserted into the mold 10 which is in the position shown in full lines in FIG. 1.

By depressing a pedal (not shown) the support member 9 is pressed against the pre-assembled heel. At the same time, the pedal causes the driving cam 7 to move the push rod 6 so that the nail drivers 4 force the nails 8 through all layers of heel material, whereby the heel 11 is nailed together.

The pivot pin 29 moves with the driving cam 7 and the resulting movement of the connecting rod 24 shifts the sleeve 25 upwards. The detent member 37 is carried upward with the sleeve 25 until it abuts against the beveled ends 21 of the pins 14, 14, whereby the detent member 37 is rotated against the action of the spring 38. During further lifting movement with the sleeve 25, the detent member 37 drops into the notches 22 of the pins 14.

During the return movement of the driving cam, the sleeve 25 is retracted downwards. Because of the engagement of the detent member 37 in the notches 22 of the pins 14 and 14', the mold It) is displaced downward against the pressure of the springs 15 and 15' as shown in FIGS. and 6. The lower position of the mold 1% is shown in dotted lines in FIGS. 1 and 2. The heel 11, the pieces of which have been pressed in the mold during the entire cycle, is released by the retraction of the mold and may be taken off the nailing head.

The mold 10 remains in its bottom position until the filling mechanism (not shown) of the nailing machine fills the nailing head 1 with nails 8. When the spring loaded releasing pin 39 is pressed, the detent member 37 is deflected out of engagement with the notches 22 of the pins 14 and 14' so that the latter are raised by the springs and 15' together with the mold 10 which is returned to its operative position in which it is secured by the spring-loaded pins 19. The mold 10 is thus prepared for filling with new heelmaterial.

In this way it is possible to nail heels in a mold and to release them therefrom at the same place. During the entire nailing operation, the heel is kept under pressure in the mold. Release of the heel from the mold takes place without any loss of time during the return movement of the driving cam.

I claim:

1. In a heel nailing device, in combination, a support; a mold base element mounted on said support; a tubular heel mold member having an axis, said mold member being movable on said support between a first position in which said base element is located near one endof said mold member so as to define a cavity therein, and a second position in which said base element is located in said cavity near the other end of said mold member, said base element being formed with a plurality of axially extending openings; nail driving means movably mounted on said support for driving nails through said openings into said cavity when said mold member is in said first position thereof; actuating means for sequentially actuating nail driving movement of said nail driving means and movement of said mold member from said first to said second position thereof; and means for retaining the heel on said base element adjacent said openings during said nail driving movement.

2. In a heel nailing device, in combination, a support; a mold base element having a face mounted on said support; a tubular heel mold member having an axis, said mold member being movable on said support between a first position in which said base element is located near one end of said mold member and said face extends transversely of said axis so as to define a cavity in said mold member, and a second position in which said base element is located in said cavity near the other end of said mold member, said base element being formed with a plurality of axially extending openings in said face thereof; nail driving means movably mounted on said support for driving nails through said openings into said cavity when said mold member is in said first position thereof; actuating means for sequentially actuating nail driving movement of said nail driving means and movement of said mold member from said first to said second position thereof; and means for retaining a heel on said base element adjacent said openings during said nail driving move ment.

3. In a heel nailing device, in combination, a support; a mold base element mounted on said support; a tubular heel mold member having an axis, said mold member being movable on said support between a first position in which said base element is located near one end of said mold member so as to define a cavity therein, and a second position in which said base element is located in said cavity near the other end of said mold member, said base element being formed with a plurality of axially extending openings; nail driving means movably mounted on said support for driving nails through said openings into said cavity when said mold member is in said first position thereof; first actuating means for sequentially actuating nail driving movement of said nail driving means and movement of said mold member from said first to said second position thereof; second actuating means for returning said mold member from said second to said first position thereof; and means for retaining a heel on said base element adjacent said openings during said nail driving movement.

4. In a heel nailing device, in combination, a support; a mold base element mounted on said support; a tubular heel mold member having an axis, said mold member being movable on said support between a first position in which said base element is located near one end of said mold member, so as to define a cavity therein, and a second position in which said base element is located in said cavity near the other end of said mold member, said base element being formed with a plurality of axially extending openings; nail driving means movably mounted on said support for driving nails through said openings into said cavity when said mold member is in said first position thereof; first actuating means for sequentially actuating nail driving movement of said nail driving means and movement of said mold member from said first to said second position thereof; second actuating means independent of said first actuating means for returning said mold member from said second to said first position thereof; and means for retaining a heel on said base element adjacent said openings during said nail driving movement.

5. In a heel nailing device, in combination, a support;

a mold base element mounted on said support; a tubular heel mold member having an axis, said mold member being movable on said support between a first position in which said base element is located near one end of said mold member so as to define a cavity therein, and a second position in which said base element is located in said cavity near the other end of said mold member, said base element being formed with a plurality of axially extending openings; nail driving means reciprocably mounted on said support for driving nails through said openings into said cavity during one stroke of the reciprocating movement thereof when said mold member is in said first position thereof; actuating means for sequentially actuating said one stroke of said nail driving means and movement of said mold member from said first to said second position thereof; and means for retaining a heel on said base element adjacent said openings durin said nail driving movement.

6. In a heel nailing device, in combination, a support; a mold base element mounted on said support; a tubular heel mold member having an axis, said mold member being movable on said support between a first position in Which said base element is located near one end of said mold member so as to define a cavity therein, and a second position in which said base element is located in said cavity near the other end of said mold member, said base element being formed with a plurality of axially extending openings; nail driving means movably mounted on said support for driving nails through said openings into said cavity when said mold member is in said first position thereof; actuating means for sequentially actuating nail driving movement of said nail driving mean and movement of said mold member from said first to said second position thereof; means for adjusting the length of the movement of said mold member between said positions thereof; and means for retaining a heel on said base element adjacent said openings during said nail driving movement.

7. In a heel nailing device, in combination, a support; a mold base element mounted on said support; a tubular heel mold member having an axis, said mold member being movable on said support between a first position in which said base element is located near one end of said mold member so as to define a cavity therein, and a second position in which said base element is located in said cavity near the other end of said mold member, said base element being formed with a plurality of axially extending openings; nail driving means movably mounted on said support for driving nails through said openings into said cavity when said mold member is in said first position thereof; actuating means for sequentially actuating nail driving movement of said nail driving means and movement of said mold member from said first to said second position thereof; means for axially adjusting the location of one of said positions without changing the location of the other one of said positions; and means for retaining a heel on said base element adjacent said openings during said nail driving movement.

8. In a heel nailing device, in combination, a support; a mold base element mounted on said support; a tubular heel mold member having an axis, said mold member being movable on said support between a first position in which said base element is located near one end of said mold member so as to define a cavity therein, and a second position in which said base element is located in said cavity near the other end of said mold member, said base element being formed with a plurality of axially extending openings; nail driving means movably mounted on said support for driving nails through said openings into said cavity when said mold member is in said first position thereof; actuating means for sequentially actuating nail driving movement of said nail driving means and movement of said mold member from said first to said second position thereof; means for axially adjusting the location of said first position without changing the location of said second position; and means for retaining a heel on said base element adjacent said openings during said nail driving movement.

9. In a heel nailing device, in combination, a support; a mold base element mounted on said support; a tubular heel mold member having an axis, said mold member being movable on said support between a first position in which said base element is located near one end of said mold member so as to define a cavity therein, and a second position in which said base element is located in said cavity near the other end of said mold member, said base element being formed with a plurality of axially extending openings; nail driving means movably mounted on said support for driving nails through said openings into said cavity when said mold member is in said first position thereof; actuating means reciprocably movably mounted on said support for actuating nail driving movement of said nail driving means during one stroke of the reciprocating movement thereof and movement of said mold member from said first to said second position thereof during the other stroke of the reciprocating movement of said actuating means; and means for retaining a heel on said base element adjacent said openings during said nail driving movement.

References Cited in the file of this patent UNITED STATES PATENTS 197,628 Gregg Nov. 27, 1877 239,568 Sperry Mar, 29, 1881 352,649 Jones Nov. 16, 1886 559,789 Raymond May 5, 1896 1,018,549 Bostock Feb. 27, 1912 1,127,001 Hill Feb. 2, 1915 1,386,639 Lund Aug. 9, 1921 1,396,802 Winkley Nov. 15, 1921 2,046,443 Barclay et al. July 7, 19336 

